Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

4.4 2017 > Exam Facts > Flashcards

Exam Facts Flashcards

1
Q

What does the gradient of a distance time graph correspond to?

A

Speed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What does the area beneath a distance time graph correspond to?

A

Nothing!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does the gradient of a speed time graph correspond to?

A

Acceleration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does the area beneath a speed time graph correspond to?

A

Distance travelled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a scalar?

A

A quantity with just a magnitude and no direction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a vector?

A

A quantity with both magnitude and direction.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is friction?

A

A force that OPPOSES MOTION

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is stopping distance?

A

Braking distance + Thinking distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is thinking distance?

A

The distance traveled between seeing the obstacle and applying the brakes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is braking distance?

A

The distance traveled between applying the brakes and coming to a full stop.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What factors affect thinking distance?

A

Drinking alcohol, tiredness

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What factors affect braking distance?

A

Condition of the brakes, condition of the road

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is Newton’s Third Law?

A

Every force has an equal but opposite force.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is alternating current?

A

A current that changes direction, repeatedly.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the advantages of parallel circuits for lighting?

A

Brighter lights, when one breaks not all of them turn off, can be controlled separately

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What does an increase of resistance look like on an IV curve?

A

Decreasing gradient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is an LDR?

A

Light dependent resistor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

How does the resistance of an LDR change when light intensity increases?

A

Decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

How does the resistance of a thermistor change when temperature increases?

A

Decreases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

How does the resistance of a metal wire change when temperature increases?

A

Increases

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Define current

A

The rate of flow of charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the nature of current?

A

Negatively charged electrons flowing from negative to positive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is conventional current?

A

Flow of charge from positive to negative

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Why is current conserved at a junction?

A

Conservation of charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What happens to currents and voltages in parallel?

A

Currents split, voltages stay the same

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

What happens to currents and voltages in series?

A

Voltages split, currents stay the same

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

What is the total resistances of two resistors in series?

A

The sum of the resistances

28
Q

What is the definition of voltage?

A

Energy transferred per unit charge passed

29
Q

What is a volt?

A

A joule per colomb

30
Q

Why does an insulator become charged when rubbed with another insulator?

A

Friction transfers electrons

31
Q

What two things do waves transfer?

A

Energy and information

32
Q

What is a longitudinal wave?

A

A wave where the direction of energy transfer is parallel to the oscillation

33
Q

What is a transverse wave?

A

A wave where the direction of energy transfer is perpendicular to the oscillation

34
Q

Define amplitude

A

Distance from the peak of a wave to the equilibrium position

35
Q

Define frequency

A

The number of complete oscillations per unit time

36
Q

Define wavelength

A

The distance from one peak of a wave to an adjacent peak

37
Q

Define period of a wave

A

Time taken for one complete oscillation

38
Q

What is the Doppler effect?

A

a change in the observed frequency and wavelength of a wave when its source is moving relative to an observer

39
Q

What is the order of the EM spectrum in order of increasing wavelength?

A

Gamma, X-ray, UV, Visible, IR, Micro, Radio

40
Q

What is the order of the EM spectrum in order of increasing frequency?

A

Radio, Micro, IR, Visible, UV, X-ray, Gamma

41
Q

What is the order of colours in order of increasing frequency?

A

Red Orange Yellow Green Blue Indigo Violet

42
Q

What is the order of colours in order of increasing wavelength?

A

Violet, Indigo, Blue, Green, Yellow, Orange, Red

43
Q

What is the application of radio waves?

A

Broadcasting and communications

44
Q

What is the application of microwaves?

A

Cooking and satellite transmissions

45
Q

What is the application of infrared

A

Heaters and night vision equipment

46
Q

What is the application of visible light?

A

Optical fibres and photography

47
Q

What is the application of ultraviolet?

A

Fluorescent lamps

48
Q

What is the application of X-rays?

A

Observing the internal structure of objects and materials, including for medical application

49
Q

What is the application of gamma rays?

A

Sterilizing food and medical equipment

50
Q

What is the danger of microwaves?

A

Internal heating of body tissue

51
Q

What is the danger of infrared?

A

Skin burns

52
Q

What is the danger of ultraviolet?

A

Damage to surface cells and blindess

53
Q

What is the danger of gamma rays?

A

Cancer, mutation

54
Q

What is the law of reflection?

A

i = r

55
Q

What is the critical angle?

A

The angle of incidence inside a material when the angle of refraction is 90 degrees.

56
Q

What is the frequency range of human hearing?

A

20 Hz - 20 000 Hz

57
Q

What does pitch relate to?

A

Frequency

58
Q

What does loudness relate to?

A

Amplitude

59
Q

What are the three things needed on a Sankey diagram?

A

Arrows, Labels, Correct scale

60
Q

Describe the radiative properties of black, matte surfaces.

A

Absorb and emit the most radiation, least reflection of radiation

61
Q

Describe the radiative properties of white, shiny surfaces.

A

Absorb and emit the least radiation, most reflection of radiation

62
Q

Define power

A

Rate of transfer of energy

63
Q

Describe the orbit of a comet

A

Highly elliptical, faster the closer it is to the star

64
Q

What force causes orbits?

A

Gravity

65
Q

What is the universe?

A

A collection of billions of galaxies

66
Q

What is a galaxy?

A

A collection of billions of stars

67
Q

What is the name of our galaxy?

A

The Milky Way

4.4 2017 (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions